What size jambs? Are you asking about the door opening? If so, I don’t know exactly. The house plans are here, but we’d have to go measure to get exact opening size. I can do that, but I think they are standard size for those size doors. The sizes were originally specified by a door manufacturer.

The two front doors will be stained, so I assume you would put stained jambs with those. We just want white metal doors, so those jambs would be painted white, I think?